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4 years ago

HELP ME PLEASE !

Mathematics

1 answer:

STatiana [176]4 years ago

8 0

1.+-7, 2.+-8, 3.12, 5.22

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Kalinda is 68. 7 inches tall and wants to know how many inches taller she is than Terrence. If t represents Terrence’s height in

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Answer:

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3 years ago

Solve <br> 3x2- 2x -7 = 0

Gwar [14]

Answer:

x=-2

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3 years ago

Use the coordinates of the labeled points to find a point-slope equation of the line. (3,-4)

seropon [69]

Answer:

slope=-3

y=-3x+5

Step-by-step explanation:

use two given points (3,-4)(0,5)

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3 years ago

Read 2 more answers

A circle has a radius of 30cm what is the area

Lana71 [14]

r = 30 cm

formula: A = πr²

A = πr²

A = π30²

A = 900π

if π = 3.14, then the answer is 2,826 cm

if π is not defined, the answer is 2,827.43 cm

3 0

3 years ago

For the figures below, assume they are made of semicircles, quarter circles and squares. For each shape, find the area and perim

laiz [17]

Answer:

Part 1) $A=36(\pi-2)\ cm^2$

Part 2) $P=6(\pi+2\sqrt{2})\ cm$

Step-by-step explanation:

Part 1) Find the area

we know that

The area of the shape is equal to the area of a quarter of circle minus the area of an isosceles right triangle

$A=\frac{1}{4}\pi r^{2}-\frac{1}{2}(b)(h)$

we have that the base and the height of triangle is equal to the radius of the circle

$r=12\ cm\\b=12\ cm\\h=12\ cm$

substitute

$A=\frac{1}{4}\pi (12)^{2}-\frac{1}{2}(12)(12)\\A=(36\pi-72)\ cm^2$

simplify

Factor 36

$A=36(\pi-2)\ cm^2$

Part 2) Find the perimeter

The perimeter of the figure is equal to the circumference of a quarter of circle plus the hypotenuse of the right triangle

The circumference of a quarter of circle is equal to

$C=\frac{1}{4}(2\pi r)=\frac{1}{2}\pi r$

substitute the given values

$C=\frac{1}{2}\pi (12)\\C=6\pi\ cm$

The hypotenuse of right triangle is equal to (applying the Pythagorean Theorem)

$AC=\sqrt{12^2+12^2}\\AC=\sqrt{288}\ cm$

simplify

$AC=12\sqrt{2}\ cm$

Find the perimeter

$P=(6\pi+12\sqrt{2})\ cm$

simplify

Factor 6

$P=6(\pi+2\sqrt{2})\ cm$

8 0

3 years ago